At the Same Temperature, Why Are Magmas with High Silica

question 153

Multiple Choice

At the same temperature, why are magmas with high silica contents more viscous?

• A)Because high viscosity magma will flow more readily and rhyolites flow the farthest.
• B)They are more linked together in chains and nets that are strong enough to resist flow.
• C)Any magma with more than 50% silica content is too sticky to flow.
• D)The magmas with high silica content are also richer in iron and too dense to flow.

---

Definitions:

Average Tariff

The average rate of duty or tax levied on imported goods.

Imports

Goods or services bought from foreign countries for domestic consumption or use.

Free Trade

International trade left to its natural course without tariffs, quotas, or other restrictions.

Absolute Advantage

The ability of an individual, company, or country to produce a good or service at a lower cost per unit than the cost at which any other entity can produce the same good or service.